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runtime: rewrite stale comment about pacer

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Change-Id: Ieb8015164526da59b042031234146def06f70a1d
Reviewed-on: https://go-review.googlesource.com/c/go/+/393399
Trust: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
This commit is contained in:
Michael Anthony Knyszek 2022-03-02 17:41:49 +00:00 committed by Michael Knyszek
parent f990b0f1e8
commit 23756207fb
1 changed files with 7 additions and 8 deletions
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15
src/runtime/mgcpacer.go
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@ -73,15 +73,14 @@ func init() {
// when to trigger concurrent garbage collection and how much marking // when to trigger concurrent garbage collection and how much marking
// work to do in mutator assists and background marking. // work to do in mutator assists and background marking.
// //
// It uses a feedback control algorithm to adjust the gcController.trigger // It calculates the ratio between the allocation rate (in terms of CPU
// trigger based on the heap growth and GC CPU utilization each cycle. // time) and the GC scan throughput to determine the heap size at which to
// This algorithm optimizes for heap growth to match GOGC and for CPU // trigger a GC cycle such that no GC assists are required to finish on time.
// utilization between assist and background marking to be 25% of // This algorithm thus optimizes GC CPU utilization to the dedicated background
// mark utilization of 25% of GOMAXPROCS by minimizing GC assists.
// GOMAXPROCS. The high-level design of this algorithm is documented // GOMAXPROCS. The high-level design of this algorithm is documented
// at https://golang.org/s/go15gcpacing. // at https://github.com/golang/proposal/blob/master/design/44167-gc-pacer-redesign.md.
// // See https://golang.org/s/go15gcpacing for additional historical context.
// All fields of gcController are used only during a single mark
// cycle.
var gcController gcControllerState var gcController gcControllerState
type gcControllerState struct { type gcControllerState struct {